Well engineering is like building a big straw in the ground so we can drink water or oil! Do you know how when you drink from a straw, you have to suck really hard to get the liquid up? It's like that but much, much bigger. First, engineer people have to find where the water or oil is so they know where to put the straw. Then, they dig a big hole deep into the ground and put a pipe, which is like a really long straw, down into the hole. Sometimes they have to put special rocks or sand around the pipe to keep it steady. After that, they can start pumping the water or oil out of the ground and use it for lots of different things like making electricity or driving cars! But it's important to be safe because sometimes the things that come out of the ground can be dangerous if we don't handle them properly. That's why engineer people work really hard to make sure the well is built well and that everyone stays safe.